Frolovite Mineral Data

Frolovite Mineral Data +

General Frolovite Information

Chemical Formula:

CaB2(OH)8

Composition:

Molecular Weight = 197.76 gm

Calcium 20.27 % Ca 28.36 % CaO

Boron 10.93 % B 35.20 % B₂O₃

Hydrogen 4.08 % H 36.44 % H₂O

Oxygen 64.72 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaB₂(OH)₈

Environment:

In a skarn deposit replacing calciborite.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

Novo-Frolvsk, Turinsk region, Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 20060

PDF 45-7

Frolovite Image

Images:

Frolovite

Comments: Clear to white crystalline frolovite in rock.
Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Frolovite Crystallography

Axial Ratios:

a:b:c =1.3686:1:1.4323

Cell Dimensions:

a = 7.774, b = 5.68, c = 8.136, Z = 2; alpha = 113.15°, beta = 101.67°, gamma = 107.87° V = 307.89 Den(Calc)= 2.13

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.084(1), 3.858(0.9), 3.471(0.8),

Physical Properties of Frolovite

Color:

Gray white, White.

Density:

2.14

Diaphaniety:

Translucent

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

3.5 - Copper Penny

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Frolovite

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.039 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2693,KPDmeas= 0.2681,KC= 0.2591

Optical Data:

Biaxial (?), a=1.563, b=1.572, g=1.586, bire=0.0230, 2V(Calc)=80, 2V(Meas)=70.

Calculated Properties of Frolovite

Electron Density:

r_electron=2.21 gm/cc
note: r_Frolovite=2.14 gm/cc.

Fermion Index

Fermion Index = 0.02234
Boson Index = 0.97766

Photoelectric:

PE_Frolovite= 2.65 barns/electron
U=PE_Frolovite x r_electron= 5.86 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Frolovite is Not Radioactive

Frolovite Classification

Dana Class:

25.1.3.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.1)Dana Type

(25.1.3)Dana Group

25.1.3.1 Frolovite CaB2(OH)8 P1 1

Strunz Class:

V/G.09-10 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO4]5- tetraheders

V/G.09 - Frolovite - Henmilite series

V/G.09-10 Frolovite CaB2(OH)8 P1 1

V/G.09-20 Henmilite Ca2Cu[B(OH)4]2(OH)4 P1 1

Other Frolovite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Frolovite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Frolovite Specimen Label here :

Frolovite

CaB2(OH)8
Dana No: 25.1.3.1 Strunz No: V/G.09-10
Locality:

Notes: